Teledyne 7600 - Infrared gas analyzer - communication manual - Manual (Page 22)

Teledyne Analytical Instruments
22
(2) Function explanations
Word data of continuous word number is written from write-in start address. Write-in word
data are transmitted from master station in the order of upper and lower bytes.
(3) Message transmission (example)
The following shows an example of writing the CH1 (1st component) alarm settings to No. 1
station.
CH1 range-1 high alarm setting = 1388
H
(= 5000
D
)
CH1 range-1 low alarm setting = 000A
H
(= 10
D
)
CH1 range-2 high alarm setting = 03E8
H
(= 1000
D
)
CH1 range-2 low alarm setting = 000A
H
(= 10
D
)
CH1 range-1 high alarm setting Relative address: 0023
H
Data number: 04
H
Command message composition (byte)
Response message composition (byte)
Station No. 01
H
Station No. 01
H
Function code 10
H
Function code 10
H
Upper 00
H
Upper 00
H
Write-in word number
Lower 04
H
Write-in start No.
Lower 23
H
Upper 00
H
Write-in byte number 08
H
Write-in word number
Lower 04
H
Upper 13
H
Lower 30
H
First write-in word data
Lower 88
H
CRC data
Upper 00
H
Upper 00
H
Next write-in word data
Lower 0A
H
Upper 03
H
Next write-in word data
Lower E8
H
Upper 00
H
Last write-in word data
Lower 0A
H
Lower E2
H
CRC data
Upper A6
H
Since the transmission data can not include a decimal point, data of 500.0 is transmitted as
"5000".
For transmission format of each data, refer to the Address map (Chapter 7).